What Does Lead Poisoning Have To Do With Criminal Behavior?

In the wake of the death of Freddie Gray, the Baltimore man who died after sustaining spinal injuries in police custody, The Washington Post published a story chronicling his exposure to lead paint as a young child in Baltimore, and the effects it may have had on him.

Gray, his twin sister and mother were part of a lawsuit in a 2009, in which they received a settlement from the property manager because of their exposure to lead.

For over three decades, Kim Dietrich, a professor of environmental health and director of the division of epidemiology and biostatistics at University of Cincinnati, has been following a group of individuals exposed to lead.

He speaks with Here & Now's Robin Young about his research and the relationship between childhood blood-lead concentrations and criminal arrests.